风力发电机组轴系扭振模式稳定性分析  

Stability analysis of the torsional mode for the shafting of the wind generating set

作　　者：张超[1] 王渝红[1] 欧林[2] 李兴源[1] 张彪[1] 

机构地区：[1]四川大学电气信息学院,成都610065 [2]重庆市电力公司电力科学研究院,重庆401123

出　　处：《电测与仪表》2015年第2期1-4,42,共5页Electrical Measurement & Instrumentation

基　　金：国家863高技术重点项目(211AA05A119);国网四川省电力公司检修公司科技项目(SGSCJXYJ1301058)

摘　　要：针对带串联补偿装置的并网双馈风力发电机组轴系扭振模式的稳定性,搭建了风力发电机轴系的三质量块等效模型,用小扰动法分析了轴系不同质块间的扭振模式。基于矩阵束算法辨识串联补偿度对风电场发电机组轴系扭转模式稳定性的影响,分析表明在故障情况机组轴系可能发生暂态扭矩放大。在PSCAD/EMTDC中搭建了某实际风电场中风力机轴系和发电机电磁暂态模型以及电网其它部分模型。仿真结果表明:电网故障会引发轴时系扭振模式不稳定现象,同时验证了串联补偿影响轴系扭振模式的稳定性。To achieve the stability of the shafting torsional mode of the grid-connected doubly-fed wind generating set with the series compensation device,a three-mass equivalent model for the wind generator shaft was constructed and the torsional modes among different masses of the shafting were analyzed with the small disturbance method. Based on the influence of the matrix pencil algorithm series compensation degree on the shafting torsional mode stability of the wind generating set,the analysis results showed that transient torque amplification was likely to occur in the shaft system under a faulty condition. A electromagnetic transient model for the wind turbine shaft system and the generator and models for the other parts of the grid of an actual wind farm were built in the PSCAD / EMTDC. The simulation results showed that some grid faults might result in instability of the shafting torsional mode,and verified that the series compensation could affect the stability of the shafting torsional mode.

关 键 词：双馈感应风力发电机 扭振模式 轴系 矩阵束算法 串联补偿度 暂态扭矩放大 

分 类 号：TM714.3[电气工程—电力系统及自动化]